NEWTON : ON COLOBATION IN FOSSIL SHELLS. 283 



Formation. — Santonian . 



Locality. — Bromley, Kent. 



Specimen consisting of the upper valve of a species probably related 

 to Milsson's 0. curvirostris. The relics of coloration are represented 

 by a few darkish bands radiating from the umbonal region and 

 extending to the ventral margin, being considerably curved and bent 

 during their progress over the surface of the valve. 



In the British Museum [44677]. 



Gryph^a columba, Lamarck. PI. XXIV, Fig. 16. 

 Gryplma columla, Lamarck : Hist. Nat. Anim. sans Vert., vol. vi 

 (1819), pt. 1, p. 198 (described from figure in Bruguiere's Ency. 

 Method., 1791, pi. clxxxix, figs. 3, 4). 



Formation. — Cenomanian. 



Locality. — Co. Antrim, Ireland. 



The markings on this shell consist of dark, broad, radiating stripes, 

 extending from the umbo to the ventral margin, being mostlj' arranged 

 equidistantly, although sometimes rather irregularly or bent. Only 

 little more than half the specimen has been figured, because the actual 

 shell-structure is absent from the lower part of the valve ; its total 

 height measurement is 75 millimetres. All the known figures of this 

 species show the bands reaching to the basal margin of the shell, a fact 

 also proved by actual specimens examined from Bohemia, France, etc. 

 These radiating stripes are indicated in Bruguiere's old figures, as 

 well as being referred to by Lamarck. 



The specimen is in the British Museum [L. 14399]. 



Pecten fulminifer, Holzapfel. 



Peden fulminifer, Holzapfel: Palseontographica, vol. xxxv (1889), 

 p. 230, pi. xxvi, fig. 14. 



Formation. — Santonian. 



Locality. — Aix-la-Chapelle, Germany. 



The specimen figured in the above work exhibits a valve with 

 zigzag patterns, arranged longitudinally in four or five series, with 

 regular angulations fitting into one another. The ears are decorated 

 with oblique, crinkled markings. The figure represents an enlarged 

 restoration made up from a fragmentary specimen. 



Stncyclonema orbicularis (J. Sowerby). 

 Pecten orbicularis, J. Sowerby: Min. Conch., vol. ii (1817), p. 193, 



pi. clxxxvi. 

 Syncyclonema orbicularis, Noetling : Palaeontologische Abhandlungen 

 (Dames & Kayser), vol. ii (1885), part 4, p. 214, pi. xviii, fig. 5. 

 Formation. — Cenomanian. 

 Locality. — Baltic regions. 



Dr. Noetling figures a small example, 7 by 9 mm., of this species in 

 the above memoir, which shows zigzag markings in longitudinal 

 arrangement of four rows, the two lowest occupying the best half 

 of the shell and furnished with long lines and few angulations, whilst 

 the upper series are more broken up and form several angulations. 



